// Copyright 2013 The Flutter Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.

@import Flutter;
@import XCTest;
@import webview_flutter_wkwebview;

#import <OCMock/OCMock.h>

@interface FWFObjectHostApiTests : XCTestCase
@end

@implementation FWFObjectHostApiTests
- (void)testAddObserver {
  NSObject *mockObject = OCMClassMock([NSObject class]);

  FWFInstanceManager *instanceManager = [[FWFInstanceManager alloc] init];
  [instanceManager addDartCreatedInstance:mockObject withIdentifier:0];

  FWFObjectHostApiImpl *hostAPI =
      [[FWFObjectHostApiImpl alloc] initWithInstanceManager:instanceManager];

  NSObject *observerObject = [[NSObject alloc] init];
  [instanceManager addDartCreatedInstance:observerObject withIdentifier:1];

  FlutterError *error;
  [hostAPI
      addObserverForObjectWithIdentifier:@0
                      observerIdentifier:@1
                                 keyPath:@"myKey"
                                 options:@[
                                   [FWFNSKeyValueObservingOptionsEnumData
                                       makeWithValue:FWFNSKeyValueObservingOptionsEnumOldValue],
                                   [FWFNSKeyValueObservingOptionsEnumData
                                       makeWithValue:FWFNSKeyValueObservingOptionsEnumNewValue]
                                 ]
                                   error:&error];

  OCMVerify([mockObject addObserver:observerObject
                         forKeyPath:@"myKey"
                            options:(NSKeyValueObservingOptionOld | NSKeyValueObservingOptionNew)
                            context:nil]);
  XCTAssertNil(error);
}

- (void)testRemoveObserver {
  NSObject *mockObject = OCMClassMock([NSObject class]);

  FWFInstanceManager *instanceManager = [[FWFInstanceManager alloc] init];
  [instanceManager addDartCreatedInstance:mockObject withIdentifier:0];

  FWFObjectHostApiImpl *hostAPI =
      [[FWFObjectHostApiImpl alloc] initWithInstanceManager:instanceManager];

  NSObject *observerObject = [[NSObject alloc] init];
  [instanceManager addDartCreatedInstance:observerObject withIdentifier:1];

  FlutterError *error;
  [hostAPI removeObserverForObjectWithIdentifier:@0
                              observerIdentifier:@1
                                         keyPath:@"myKey"
                                           error:&error];
  OCMVerify([mockObject removeObserver:observerObject forKeyPath:@"myKey"]);
  XCTAssertNil(error);
}

- (void)testDispose {
  NSObject *object = [[NSObject alloc] init];

  FWFInstanceManager *instanceManager = [[FWFInstanceManager alloc] init];
  [instanceManager addDartCreatedInstance:object withIdentifier:0];

  FWFObjectHostApiImpl *hostAPI =
      [[FWFObjectHostApiImpl alloc] initWithInstanceManager:instanceManager];

  FlutterError *error;
  [hostAPI disposeObjectWithIdentifier:@0 error:&error];
  // Only the strong reference is removed, so the weak reference will remain until object is set to
  // nil.
  object = nil;
  XCTAssertFalse([instanceManager containsInstance:object]);
  XCTAssertNil(error);
}
@end